1423420643 has 2 divisors, whose sum is σ = 1423420644. Its totient is φ = 1423420642.

The previous prime is 1423420627. The next prime is 1423420651. The reversal of 1423420643 is 3460243241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1423420643 - 2⁴ = 1423420627 is a prime.

It is a super-2 number, since 2×1423420643² = 4052252653837066898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1423440643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711710321 + 711710322.

It is an arithmetic number, because the mean of its divisors is an integer number (711710322).

Almost surely, 2^1423420643 is an apocalyptic number.

1423420643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1423420643 is an equidigital number, since it uses as much as digits as its factorization.

1423420643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 1423420643 is about 37728.2472823745. The cubic root of 1423420643 is about 1124.8926693983.

Adding to 1423420643 its reverse (3460243241), we get a palindrome (4883663884).

The spelling of 1423420643 in words is "one billion, four hundred twenty-three million, four hundred twenty thousand, six hundred forty-three".